|
|
|
|
Thread Tools | Display Modes |
01-16-2010, 08:58 PM | #1 |
Scooby Specialist
Member#: 178468
Join Date: Apr 2008
Location: Somerset, NJ
Vehicle:2007 UGM STI IAG Built |
Datalog - Knock Correction - Dirty MAF Sensor
Figured I would do some data logging today to check for anything strange. I noticed some negative values related to knock correction, and was wondering if this is shift knock or the knock sensor picking up false knock of some kind. I am hearing that negative KC values are acceptable in the lower RPMs, but at WOT it can be cause for concern.
I will add that the car is running great with no signs off any issues. I have an AEM wideband that reads 11.6 at WOT, and the car holds boost fine. These logs were taken from 3rd-4th-5th gear. Any comments on the KC are welcome. Thanks. Log 1 Code:
RPM LOAD DAM IADV KC TP Boost AFR IDC MAF MAFV VS 2638 0.8 1 33.5 0 36.06 -1.45 12.88 9.58 73.54 2.8 31.69 2755 1.76 1 18.5 0 99.96 1.89 15.07 17.33 83.46 2.74 32.31 2839 2 1 15 -1.4 99.96 3.48 12.19 19.91 97.11 2.96 32.93 2924 2.22 1 15.5 -1.4 99.96 5.37 11.5 19.64 112.13 3.14 32.93 3100 2.41 1 16 -1.4 99.96 7.83 12.88 23.4 124.64 3.26 33.55 3260 2.66 1 16.5 -1.05 99.96 10.88 12.88 27.59 152.89 3.48 36.04 3468 3.14 1 13 -2.45 99.96 15.95 11.15 40.5 189.88 3.84 36.04 3741 3.85 1 12 -2.45 99.96 22.19 11.15 54.8 270.44 4.18 39.15 4054 4.15 1 12.5 -2.45 99.96 22.19 11.15 60.61 281.31 4.26 39.15 4427 4.08 1 14.5 -2.1 99.96 22.19 11.15 62.72 292.42 4.3 44.12 4757 3.98 1 15.5 -2.1 99.96 22.19 11.15 67 317.05 4.4 49.09 5034 3.98 1 16.5 -2.1 99.96 22.19 11.15 71.87 347.06 4.48 49.09 5334 4.1 1 17.5 -1.75 99.96 22.19 11.15 74.77 350.22 4.56 55.92 5639 3.94 1 18 -1.75 99.96 22.19 11.15 76.49 370.05 4.64 55.92 5943 3.78 1 19 -1.75 99.96 22.19 11.15 77.91 379.67 4.6 61.52 6243 3.7 1 19.5 -1.75 99.96 22.19 11.15 80.28 377.74 4.6 67.73 6454 3.46 1 -12.5 0 32.93 14.94 11.15 58.44 208.34 3.74 67.73 5513 0.26 1 26.5 0 16.07 -8.41 11.27 8.15 36.75 2.3 72.7 4612 2.04 1 21.5 0 99.96 9.28 12.53 42.46 190.6 3.88 77.05 4910 3.92 1 18 0 99.96 22.19 11.15 76.09 353.4 4.54 77.05 5162 4.24 1 18.5 0 99.96 22.19 11.15 76.72 361.71 4.52 80.16 5300 4.12 1 19 0 99.96 22.19 11.15 76.15 357.23 4.58 80.16 5446 4.06 1 19.5 0 99.96 22.19 11.15 76.16 352.14 4.58 82.64 5644 3.96 1 19.5 0 99.96 22.19 11.15 77.17 366.2 4.56 85.75 5769 3.9 1 20 0 99.96 22.19 11.15 76.38 366.83 4.58 85.75 5896 3.83 1 20.5 0 99.96 22.19 11.15 77.29 377.74 4.6 90.1 6035 3.82 1 20.5 0 99.96 22.19 11.15 80.61 392.49 4.66 94.45 6180 3.74 1 21 0 99.96 22.19 11.15 79.17 380.31 4.62 94.45 6317 3.62 1 22 0 99.96 22.19 11.15 79.23 373.89 4.58 98.18 5947 1.73 1 -14.5 0 11.76 -5.08 11.15 29.94 57.09 2.18 98.18 5381 0.26 1 29 0 16.07 -9.14 11.15 8.01 33.85 2.3 101.9 5501 2.47 1 20 -1.4 99.96 13.49 11.85 63.71 294.76 4.32 103.15 5485 4.19 1 18 -1.4 99.96 22.19 11.15 83.81 393.75 4.64 103.15 5618 4.14 1 18.5 -1.4 99.96 22.19 11.15 80.55 384.8 4.68 105.63 5750 4 1 18.5 -1.4 99.96 22.19 11.15 79.93 374.53 4.64 105.63 5864 3.93 1 19 -1.05 99.96 22.19 11.15 78.62 367.48 4.6 106.25 5660 3.05 1 -12.5 0 13.33 0.29 11.15 29.77 86.94 2.94 109.98 5038 0.27 1 9 0 11.37 -9.72 11.15 6.32 18.8 1.82 109.98 4426 0.26 1 9 0 10.98 -10.59 11.39 5.73 21.64 1.8 111.23 4394 0.25 1 9 0 10.58 -11.02 12.19 5.64 16.72 1.74 112.47 4357 0.24 1 24 0 10.58 -11.31 11.96 5.56 18.8 1.76 112.47 Code:
RPM LOAD DAM IADV KC TP Boost AFR IDC MAF MAFV VS 4079 4.09 1 14 -1.05 99.96 22.19 11.15 62.2 304.88 4.24 40.39 4465 4.02 1 15.5 -1.05 99.96 22.19 11.15 64.48 291.21 4.34 44.12 4765 3.91 1 17 -0.7 99.96 22.19 11.15 69.39 314.01 4.36 49.09 5072 4.02 1 17.5 -0.7 99.96 22.19 11.15 73.87 327.55 4.48 49.09 5438 3.88 1 18.5 -0.7 99.96 22.19 11.15 75.32 362.99 4.58 55.3 5758 3.83 1 19.5 -0.35 99.96 22.19 11.15 77.91 375.17 4.58 62.14 6030 3.77 1 20 -0.35 99.96 22.19 11.15 78.51 369.4 4.6 62.14 6299 3.64 1 21 -0.35 99.96 22.19 11.15 78.1 382.88 4.66 67.73 6520 3.55 1 22 -0.35 99.96 22.19 11.15 81.63 395.66 4.66 67.73 6145 1.25 1 -15 0 10.58 -6.82 11.39 16.77 21.64 1.7 73.94 5770 0.71 1 38 0 40.38 0 11.61 25.19 127.81 3.6 77.67 5157 3.33 1 19.5 0 99.96 19.72 11.27 70.37 340.08 4.5 77.67 5248 4.23 1 17 -1.4 99.96 22.19 11.15 78.85 370.68 4.58 81.4 5407 4.04 1 17.5 -1.4 99.96 22.19 11.15 76.26 354.68 4.56 83.26 5549 3.91 1 18 -1.4 99.96 22.19 11.15 74.81 357.23 4.56 83.26 5693 3.81 1 18.5 -1.4 99.96 22.19 11.15 75.63 361.06 4.58 86.99 5851 3.77 1 19.5 -1.05 99.96 22.19 11.15 76.25 377.74 4.62 90.72 6046 3.75 1 19.5 -1.05 99.96 22.19 11.15 77.14 377.74 4.6 90.72 6106 3.75 1 20 -1.05 99.96 22.19 11.15 77.87 377.1 4.6 95.69 6289 3.64 1 21 -0.7 99.96 22.19 11.15 77.83 377.1 4.62 95.69 6378 3.55 1 21.5 -0.7 99.96 22.19 11.15 77.73 375.81 4.6 99.42 6494 3.48 1 21.5 -0.7 99.96 22.19 11.15 78.31 375.81 4.52 103.15 5950 0.55 1 9 0 11.37 -8.41 11.27 8.75 14.38 1.52 103.15 5439 1.68 1 32 0 45.86 5.08 12.42 41.29 191.67 3.88 105.01 5619 3.8 1 19.5 0 99.96 22.19 11.15 82.53 380.31 4.62 106.88 5749 4.07 1 20 0 99.96 22.19 11.15 81.34 382.86 4.62 106.88 5840 3.88 1 20 0 99.96 22.19 11.15 78.69 371.96 4.6 108.12 5933 3.8 1 20.5 0 99.96 22.19 11.15 77.24 368.75 4.62 108.12 6002 3.74 1 20.5 0 99.96 22.19 11.15 77.04 372.6 4.54 110.6 5517 0.63 1 8.5 0 10.98 -8.27 11.15 10.41 29 2.04 113.71 4943 0.26 1 9 0 11.37 -10.59 11.15 7.33 22.3 1.84 113.71 4489 0.28 1 9 0 10.98 -10.88 11.5 5.68 18.32 1.8 114.95 4450 0.24 1 9 0 10.58 -11.17 11.5 5.69 19.08 1.78 114.33 4344 0.25 1 24 0 10.58 -11.31 11.85 6.48 17.94 1.76 114.33
* Registered users of the site do not see these ads.
Last edited by ohm; 01-19-2010 at 02:20 PM. |
01-16-2010, 10:44 PM | #2 |
Scooby Newbie
Member#: 193591
Join Date: Nov 2008
Chapter/Region:
RMIC
Location: Salt Lake city, Utah
Vehicle:04 WRX VF34 water/meth, spt intake |
do you have a front mount intercooler? if you dont those AFRs seem a little lean at WOT
|
01-16-2010, 10:49 PM | #3 |
Scooby Specialist
Member#: 120355
Join Date: Jul 2006
Chapter/Region:
SWIC
Location: prescott valley, az
Vehicle:2004 wrx wagon 2.5 20g-xt, super slow |
knock at that high a load and rpm I would be concerned about, and yea 11.6 is pretty lean for me.
|
01-16-2010, 10:51 PM | #4 |
Scooby Specialist
Member#: 178468
Join Date: Apr 2008
Location: Somerset, NJ
Vehicle:2007 UGM STI IAG Built |
|
01-17-2010, 09:45 AM | #5 |
Scooby Specialist
Member#: 178468
Join Date: Apr 2008
Location: Somerset, NJ
Vehicle:2007 UGM STI IAG Built |
With meth an AFR of 11.6 would be considered acceptable.
Another 3rd-4th-5th log with negative KC only in 3rd gear. Knock Learning is clean at 0, and DAM is 1. Code:
RPM Load DAM IADV KC KL TP Boost AFR IDC MAF MAFV VS 2282 1.68 1 17.5 -1.4 0 99.96 2.03 13.11 12.41 64.64 2.54 25.48 2413 1.83 1 16.5 -1.4 0 99.96 3.05 12.31 13.54 74.81 2.72 26.72 2528 2.04 1 16 -1.05 0 99.96 4.21 12.65 15.8 83.46 2.78 27.96 2693 2.16 1 16 -1.05 0 99.96 5.51 12.77 18.59 101.12 2.98 27.96 2819 2.4 1 16.5 -1.05 0 99.96 7.25 12.65 20.85 113.94 3.14 30.45 3017 2.58 1 17 -0.7 0 99.96 9.86 12.88 24.84 135.88 3.44 32.93 3248 2.89 1 16 -0.7 0 99.96 13.78 11.39 37.78 164.03 3.64 32.93 3523 3.56 1 14.5 -0.7 0 99.96 20.45 11.15 48.28 232.98 4 36.66 3961 4.24 1 15 -0.35 0 99.96 22.34 11.15 59.63 294.28 4.22 40.39 4321 4.11 1 16 -0.35 0 99.96 22.34 11.15 62.53 303.12 4.28 40.39 4705 3.99 1 17.5 -0.35 0 99.96 22.34 11.15 65.86 314.64 4.32 45.36 5026 4.1 1 18.5 0 0 99.96 22.34 11.15 71.86 343.21 4.48 51.57 5357 4.07 1 19.5 0 0 99.96 22.34 11.15 77.18 363 4.54 51.57 5727 3.94 1 20 0 0 99.96 22.34 11.15 78.08 380.96 4.68 57.79 6015 3.83 1 21 0 0 99.96 22.34 11.15 78.65 391.21 4.64 64.62 6337 3.7 1 22.5 0 0 99.96 22.34 11.15 80.16 380.31 4.68 70.21 6624 3.55 1 23 0 0 99.18 22.34 11.15 78.57 381.59 4.6 70.21 5750 0.21 1 27 0 0 16.46 -7.98 11.39 7.41 35.35 2.22 75.81 5215 2.55 1 19.5 0 0 99.96 14.5 11.85 59.31 281.31 4.24 78.91 5152 4.32 1 19 0 0 99.96 22.34 11.15 81.77 377.1 4.62 78.91 5479 4.05 1 19.5 0 0 99.96 22.34 11.15 76.04 376.46 4.62 82.02 5570 3.99 1 19.5 0 0 99.96 22.34 11.15 76.72 352.14 4.58 85.13 5717 3.97 1 20 0 0 99.96 22.34 11.15 76.59 371.96 4.62 85.13 5842 3.87 1 20.5 0 0 99.96 22.34 11.15 77.46 371.32 4.58 88.86 6033 3.83 1 21 0 0 99.96 22.34 11.15 78.2 368.76 4.66 92.58 6164 3.75 1 21.5 0 0 99.96 22.34 11.15 78.01 374.53 4.62 96.31 6283 3.63 1 22 0 0 99.96 22.34 11.15 78.6 373.24 4.64 96.31 6445 3.59 1 22.5 0 0 99.96 22.34 11.15 79.47 372.6 4.62 100.66 |
01-19-2010, 02:26 PM | #6 |
Scooby Specialist
Member#: 178468
Join Date: Apr 2008
Location: Somerset, NJ
Vehicle:2007 UGM STI IAG Built |
Just an update after doing a bit of research on what exactly could be causing the -KC, which could be any number of things. A few posts that I read pointed towards the MAF sensor being dirty that would contribute to some poor performance, and -KC being triggered. I figured what the hell, so I checked to see how dirty it was, and sure enough it was caked with black grim after 30k miles. The IAT probe was especially dirty, so I cleaned it up real good, then did some datalogging. To my surprise the logs were clean, no -KC existed at all. I will be monitoring the next few days to see if cleaning the MAF really helped fix the problem for good.
3rd gear log Code:
RPM Load DAM IADV KC KL TP Boost AFR IDC MAF MAFV VS 2196 1.12 1 35.5 0 0 26.66 -1.16 14.84 8.93 47.85 2.34 25.48 2267 1.33 1 28 0 0 34.5 0.58 13.57 11.74 52.7 2.48 26.1 2376 1.49 1 23.5 0 0 34.5 1.16 11.5 12.33 60.73 2.56 27.34 2496 1.61 1 20 0 0 39.98 2.03 12.31 13.44 70.48 2.7 27.34 2630 1.97 1 16 0 0 99.96 4.21 12.31 16.48 89.72 2.84 28.58 2799 2.17 1 16 0 0 99.96 5.66 12.53 19.18 105.99 3.02 31.07 2935 2.42 1 16 0 0 99.96 7.69 12.53 21.95 117.07 3.2 31.07 3144 2.57 1 16.5 0 0 99.96 10.73 12.99 26.48 141.02 3.38 32.93 3372 3.04 1 15 0 0 99.96 14.79 11.5 37.67 178.75 3.72 36.04 3700 3.71 1 14.5 0 0 99.96 22.48 11.15 51.39 243.72 4.12 36.04 4049 4.13 1 14.5 0 0 99.96 22.48 11.15 60.24 291.24 4.34 39.15 4443 4.1 1 16 0 0 99.96 22.48 11.15 62.34 312.81 4.32 44.12 4806 4.03 1 17 0 0 99.96 22.48 11.15 67.11 326.4 4.38 49.71 5125 4.05 1 18 0 0 99.96 22.48 11.15 73.14 359.14 4.58 49.71 5516 4.01 1 19 0 0 99.96 22.48 11.15 75.85 368.74 4.6 55.92 5803 3.84 1 20 0 0 99.96 22.48 11.15 77.36 380.95 4.64 62.14 6136 3.73 1 20.5 0 0 99.96 22.48 11.15 78.8 382.88 4.62 62.14 6384 3.6 1 21.5 0 0 99.96 22.48 11.15 79.2 388.01 4.6 68.35 5909 1.03 1 -15.5 0 0 11.37 -6.82 11.61 12.38 18.99 1.64 73.94 |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
How come I Can't see feedback knock correction, fine learning knock correction? | AraSh | Open Source Reflashes | 23 | 01-08-2014 07:04 PM |
WTB 99 2.5 RS MAF sensor in SE WI | STiluv55 | Private 'Wanted' Classifieds | 1 | 06-04-2010 07:20 PM |
fbkc, knock sum, knock correction advance, help | kh15 | Open Source Reflashes | 7 | 06-05-2009 12:56 PM |
Correlations between Knock Lite and negative knock correction | xFactor | Engine Management & Tuning | 1 | 01-12-2006 07:36 PM |
MAF sensor dirty? | QwikRex | Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) | 4 | 04-21-2004 05:10 PM |